void val_print(cst_file fd,const cst_val *v)
{
const cst_val *p;
if (v == NULL)
cst_fprintf(fd,"[null]");
else if (CST_VAL_TYPE(v) == CST_VAL_TYPE_INT)
cst_fprintf(fd,"%d",val_int(v));
else if (CST_VAL_TYPE(v) == CST_VAL_TYPE_FLOAT)
cst_fprintf(fd,"%f",val_float(v));
else if (CST_VAL_TYPE(v) == CST_VAL_TYPE_STRING)
cst_fprintf(fd,"%s",val_string(v));
else if (cst_val_consp(v))
{
cst_fprintf(fd,"(");
for (p=v; p; )
{
val_print(fd,val_car(p));
p=val_cdr(p);
if (p)
cst_fprintf(fd," ");
}
cst_fprintf(fd,")");
}
else
cst_fprintf(fd,"[Val %s 0x%p]",
cst_val_defs[CST_VAL_TYPE(v)/2].name,CST_VAL_VOID(v));
}
cst_val *val_new_typed(int type,void *vv)
{
cst_val *v = new_val();
CST_VAL_TYPE(v) = type;
CST_VAL_VOID(v) = vv;
return v;
}
void delete_val(cst_val *v)
{
if (v)
{
if (cst_val_consp(v))
{
delete_val(CST_VAL_CAR(v));
delete_val(CST_VAL_CDR(v));
cst_free(v);
}
else if (val_dec_refcount(v) == 0)
{
if (CST_VAL_TYPE(v) == CST_VAL_TYPE_STRING)
cst_free(CST_VAL_VOID(v));
else if (CST_VAL_TYPE(v) >= CST_VAL_TYPE_FIRST_FREE)
(cst_val_defs[CST_VAL_TYPE(v)/2].delete_function)(CST_VAL_VOID(v));
cst_free(v);
}
}
}
void *val_generic(const cst_val *v, int type, const char *stype)
{ /* a generic access function that checks the expected type */
if (v && CST_VAL_TYPE(v) == type)
return CST_VAL_VOID(v);
else
{
cst_errmsg("VAL: tried to access %s in %d type val\n",
stype,
(v ? CST_VAL_TYPE(v) : -1));
cst_error();
}
return NULL;
}
int val_equal(const cst_val *v1, const cst_val *v2)
{
if (v1 == v2)
return TRUE; /* its eq so its equal */
else if (v1 == 0)
return FALSE;
else if (CST_VAL_TYPE(v1) == CST_VAL_TYPE(v2))
{
if (cst_val_consp(v1))
return ((val_equal(val_car(v1),val_car(v2))) &&
(val_equal(val_cdr(v1),val_cdr(v2))));
else if (CST_VAL_TYPE(v1) == CST_VAL_TYPE_INT)
return (val_int(v1) == val_int(v2));
else if (CST_VAL_TYPE(v1) == CST_VAL_TYPE_FLOAT)
return (val_float(v1) == val_float(v2));
else if (CST_VAL_TYPE(v1) == CST_VAL_TYPE_STRING)
return (cst_streq(CST_VAL_STRING(v1),CST_VAL_STRING(v2)));
else
return CST_VAL_VOID(v1) == CST_VAL_VOID(v2);
}
else
return FALSE;
}
void *val_void(const cst_val *v)
{
/* The scary, do anything function, this shouldn't be called by mortals */
if ((v == NULL) ||
(CST_VAL_TYPE(v) == CST_VAL_TYPE_CONS) ||
(CST_VAL_TYPE(v) == CST_VAL_TYPE_INT) ||
(CST_VAL_TYPE(v) == CST_VAL_TYPE_FLOAT))
{
cst_errmsg("VAL: tried to access void in %d typed val\n",
(v ? CST_VAL_TYPE(v) : -1));
cst_error();
return NULL;
}
else
return CST_VAL_VOID(v);
}
